Two-stroke internal-combustion engine



Oct. 5 1926. 1,602,058

M. A. VIOLET TWO-STROKE'INTERNAL COMBUSTION ENGINE Filed June 14. 1921 2- Sheets-Sheet 1 Oct- 5 1926.

M. A. VIOLET TWO-STROKE INTERNAL COMBUSTION ENGINE 2 Sheets-Sheet 2 Filed June 14, 1921 [ZyZ In vent'or Patented Oct. 5, 1926. g

UNITED STATES PATENT .OF FlCEf MABCEL ACHILLE VIOLET, O1 PANTIN, FRANCE.

TWO-STROKE INTEBNAL-OOMBUSTIQN ENGINE.

Application ma June 14, 1921, Serial No. 477,528, and in France Jnne 16, 1920. I

respectively transverse of the axis of the two cylinders.

The two parallel cylinders A and B are united by a common explosion chamber a,

the cylinder A being provided with exhaust ports b, which arecontrolled by the pisten 0 when it is at the lower end of its stroke and which then places the cylinder in communication with the atmosphere.

The cylinder B is provided with enlar ements (1 formed in its wall and having t e object to place the lower part of this cylinder in communication with the upper part, when its piston c is at the bottom of its stroke, the gases passing through these enlargements and through .the openings 0 formed in the wall of the piston.

At the lower partof vthe two cylinders, other ports 7, f are in communication with a hollow rotary valve 9 connected by its open end with the carburetter. This valve, actuated by any suitable mechanism, such as by means'of a chain 12. for example,'rotates at the speed of the motor and, by means of suitably disposed openings, places the carburetter in communication with the lower part of the cylinders during the return stroke of the pistons.

The tight casing it contains a crank shaft actuating. two connecting rods 91, 2', upon a single crank pin 7'. Two fly wheels is at the extremities and a central fly wheel I fill the casing in as complete a manner as possible.

The operation of the motor is as follows The two pistons being at the lower end of the stroke, if the motor is turned by hand, they reascend creating a vacuum in the space below the pistons, which is filled .by the gases drawn in through the carburetter and the valve, which is open duringthe ascent of the pistons. At this moment, the pistons have at the up er part compressed the gases resulting mm a preceding cycle, .the spark issues from the plug vm, the explosion occurs and the pistons commence their descent, compressing the gases admitted by the valve, whichwas reclosed when the pistons were at the top' of their stroke.

In descending, the piston c uncovers the ports I) of the cylinder A; exhaust occurs; then piston 0 opens the enlargements d of .the cylinder 13; the compressed gases be- 'neath the pistons pass from the lower part of both cylinders to the upper part of cylinder B and into cylinder A. The pistons, in reascending, close the ports I) and d, compress -the fresh gases admitted, drawing in another charge into the casing, and the cycle recommences.

What I claim as my invention, and desire to secure by Letters Patent, is 2- 1. A two-stroke internal combustion engine, comprising a pair of parallel cylinders connected together at their heads and forming a common explosion chamber, a closed crank case common to both cylinders,-driving pistons in said cylinders, a hollow, rotary, fuel-controlling member, ports at the lower end of one of the cylinders through which fuel is supplied to the crank case from said member,sa1d ports controlled by one of said pistons,inlet ports in one cylinder and nected together at their heads and formin a common explosion chamber, a closed cran case common to both cylinders, driving pistons in said cylinders, a hollow, rotary, fuel-controlling member, ports at the-lower ends of one of the cylinders through which fuel is supplied to the crank case from said member,

said ports controlled by one of said pistons, inlet ports in one cylinder and exhaust ports in the other cylinder controlled by the respective pistons, the exhaust ports being arranged to open in advance of the inlet ports, by-passes connecting the crank case and inlet ports through the interior of one piston-and controlled at both ends thereby, a

crank, and connecting rods for the pistons connected to said crank.

In testimony that I claim the foregoing as my invention, I have si ned my name.

MARCEL ACHD nLE VIOLET. 

